Active Compression Decompression Cardiopulmonary Resuscitation Chest Compression Feedback

1. A system for managing an active compression decompression (ACD) cardiopulmonary resuscitation (CPR) treatment to a patient in need of emergency assistance, the system comprising: an applicator device configured to provide the ACD CPR treatment to the patient's chest according to a plurality of phases, the phases comprising at least an elevated compression phase, a non-elevated compression phase, an elevated decompression phase, and a non-elevated decompression phase; at least one sensor configured to be coupled to the patient's chest and to measure at least one parameter related to the ACD CPR treatment; and one or more processors and a non-transitory computer readable storage medium encoded with a computer program comprising instructions that, when executed, cause the one or more processors to perform operations comprising: process the at least one parameter related to the ACD CPR treatment during the active compression-decompressions, identify a neutral point associated with zero force or pressure being exerted on the patient's chest during a cycle of the ACD CPR treatment, the cycle comprising a continuous variation from a negative chest level value to a positive chest level value, wherein the neutral point changes over a course of the ACD CPR treatment, determine, based on the neutral point, whether at least one transition point between two successive phases of plurality of phases in the ACD CPR treatment has been reached, in response to determining that at least one transition point between two successive phases of the plurality of phases in the ACD CPR treatment has been reached, determine a phase of the ACD CPR treatment, and generate a feedback signal regarding handling of the applicator device based on the phase of the ACD CPR treatment, wherein the feedback signal is selected according to a predetermined treatment protocol.

2. The system of claim 1 , wherein the neutral point indicates a transition between an elevated position of the patient's chest above the neutral point and a non-elevated position of the patient's chest below the neutral point.

3. The system of claim 1 , wherein the at least one sensor comprises at least one of a motion sensor and a force sensor.

4. The system of claim 3 , wherein the motion sensor measures information for determining whether the at least one transition point of the ACD CPR treatment has been reached.

5. The system of claim 4 , wherein the information for determining whether the at least one transition point has been reached comprises at least one of displacement information and force information.

6. The system of claim 3 , wherein the motion sensor comprises one or more accelerometers configured to detect an acceleration signal associated with a displacement of the at least a portion of the patient's chest.

7. The system of claim 6 , wherein the one or more accelerometers comprise a first accelerometer and a second accelerometer, the first accelerometer being configured to detect an acceleration signal associated with a first displacement of a first portion of the patient's chest and the second accelerometer being configured to detect an acceleration signal associated with a second displacement of a second portion of the patient's chest.

8. The system of claim 1 , wherein the at least one transition point is between the non-elevated decompression phase and the elevated decompression phase.

9. The system of claim 1 , wherein the feedback signal comprises providing a prompt to maintain a desired release velocity during decompression upstroke for providing a negative intrathoracic pressure according to a desired treatment protocol.

10. The system of claim 9 , wherein the prompt to maintain the desired release velocity comprises at least one of an audio prompt, a verbal prompt, a non-verbal prompt, a visual prompt, a graphical prompt and a haptic prompt, or a signal for operating an automated compressor.

11. The system of claim 1 , wherein the feedback signal comprises providing a prompt to limit a force applied to the patient's chest during decompression upstroke for reducing risk of injury according to a desired treatment protocol.

12. The system of claim 11 , wherein the prompt to limit the force applied to the patient's chest during decompression upstroke comprises at least one of an audio prompt, a verbal prompt, a non-verbal prompt, a visual prompt, a graphical prompt and a haptic prompt, or a signal for operating an automated compressor.

13. The system of claim 1 , wherein the transition point is at least one of between an elevated compression phase and a non-elevated compression phase, between the elevated decompression phase and the elevated compression phase, between the elevated decompression phase and a hold time above the neutral point, and between a hold time above the neutral point and the elevated compression phase.

14. The system of claim 13 , wherein the hold time is between about 50-200 milliseconds.

15. The system of claim 1 , wherein the feedback signal comprises providing a prompt to maintain at least one of a compression depth and a compression rate according to a desired treatment protocol.

16. The system of claim 15 , wherein the prompt to maintain at least one of a compression depth and a compression rate comprises at least one of an audio prompt, a verbal prompt, a non-verbal prompt, a visual prompt, a graphical prompt and a haptic prompt, or a signal for operating an automated compressor.

17. The system of claim 15 , wherein the one or more processors are configured to receive an instruction for visual information comprising feedback related to the ACD CPR treatment to be shown on the user interface.

18. The system of claim 17 , wherein the instruction for the visual information to be shown on the user interface comprises at least one of detection of the administration of ACD CPR treatment, manual user input, and establishment of an electronic connection with the applicator device.

19. The system of claim 1 , wherein the feedback signal comprises providing information regarding at least one of a displacement above the neutral point and a depth of compression below the neutral point.

20. The system of claim 1 , wherein the at least one transition point is at least one of between the non-elevated compression phase and the non-elevated decompression phase, between the non-elevated compression phase and a hold time below the neutral point, and between hold time below the neutral point and the non-elevated decompression phase.

21. The system of claim 20 , wherein the hold time is between about 50-200 milliseconds.

22. The system of claim 1 , wherein the feedback signal comprises providing a prompt to ventilate during decompression upstroke.

23. The system of claim 22 , wherein the prompt to ventilate comprises at least one of an audio prompt, a verbal prompt, a non-verbal prompt, a visual prompt, a graphical prompt and a haptic prompt, or a signal for operating an automated ventilator.

24. The system of claim 1 , wherein the feedback signal comprises providing a prompt to maintain a release velocity during decompression upstroke for providing a negative intrathoracic pressure according to a desired treatment protocol.

25. The system of claim 1 , wherein the at least one parameter related to the ACD CPR treatment comprises at least one of displacement, velocity, acceleration, time, work, power, pressure, direction and orientation.

26. The system of claim 1 , wherein the feedback signal comprises providing a prompt to maintain the applicator device according to a desired orientation during application of the ACD CPR treatment.

27. The system of claim 1 , comprising a user interface configured to assist a rescuer interacting with the applicator device for providing ACD CPR treatment to the patient's chest.

28. The system of claim 27 , wherein the user interface is configured for displaying at least one of information representing effectiveness of CPR and an indication of the phase of the ACD CPR treatment.

29. The system of claim 27 , wherein the user interface is configured to be displayed on a device external to the system comprising at least one of a smartphone, a smartwatch, a tablet device, a monitor, a diagnostic device, and a defibrillator.

30. The system of claim 1 , wherein the applicator device comprises one or more accelerometers configured to detect an acceleration signal associated with displacement of the applicator device.

31. The system of claim 1 , comprising an adhesive pad configured to be adhered to at least a portion of a patient's chest.

32. The system of claim 1 , comprising a feedback component configured to provide feedback to assist with the ACD CPR treatment administered to the patient, wherein the one or more processors are configured to cause the feedback component to provide the feedback to assist in the administration of the ACD CPR treatment based on the generated feedback signal.

33. The system of claim 1 , wherein the zero force comprises zero static compression force and zero static decompression force being exerted on to the patient's chest during the ACD CPR treatment.